The Case IH AF374 Air Filter, also cross-referenced as 87408389, is a genuine OEM replacement part designed to provide superior filtration for Case IH Axial-Flow combines. This primary air filter effectively removes dust, dirt, and debris from the engine's air intake, protecting critical engine components and maintaining peak performance. With an outer diameter of 257 mm, an inner diameter of 146 mm, and a length of 445 mm, it ensures a precise fit and reliable operation in demanding agricultural environments. Regular replacement of the air filter is crucial for engine longevity and fuel efficiency.